Source: Epoch AI (CC BY 4.0). ECI is Epoch's item-response model over many benchmarks; each model page shows its 90% confidence interval.
Only models with both an ECI score and an OpenRouter price. Normalisation: 75% input + 25% output price. Click a point to open the model.
| # | Model | ECI ↑ | Context | In $/M | Weights | Released |
|---|---|---|---|---|---|---|
| 1 | R1 DeepSeek· reasoning | 139.0 | 64K | $0.70 | Open source | 20 Jan 2025 |
| 2 | DeepSeek V3.1 DeepSeek· reasoning | 139.9 | 164K | $0.25 | Open source | 21 Aug 2025 |
| 3 | DeepSeek V3.2 Exp DeepSeek· reasoning | 145.0 | 164K | $0.13 | Open source | 29 Sep 2025 |
| 4 | DeepSeek V4 Flash 0423 DeepSeek· reasoning | 146.1 | 1.05M | $0.062 | Open source | 24 Apr 2026 |
| 5 | DeepSeek V3.2 DeepSeek· reasoning | 146.3 | 164K | $0.28 | Open source | 1 Dec 2025 |
| 6 | DeepSeek V4 Pro 0423 DeepSeek· reasoning | 149.1 | 1.05M | $0.78 | Open source | 24 Apr 2026 |
| 7 | DeepSeek V4 Flash 0731 DeepSeek· reasoning | 154.5 | 1.31M | $0.021 | Open source | 31 Jul 2026 |
| 8 | DeepSeek V4.1 Flash DeepSeek· reasoning | 155.0 | 1.05M | $0.30 | Open source | 9 Sep 2026 |
| 9 | DeepSeek V4 Pro 0813 DeepSeek· reasoning | 155.4 | 1.05M | $0.40 | Open source | 13 Aug 2026 |
| 10 | DeepSeek V4.1 Flash (batch) DeepSeek· reasoning | — | 1.05M | $0.11 | Open source | 10 Sep 2026 |
| 11 | DeepSeek V3.1 Terminus DeepSeek· reasoning | — | 164K | $0.27 | Open source | 22 Sep 2025 |
| 12 | DeepSeek V4 Flash Vision Exp DeepSeek· reasoning | — | 1.05M | $0.44 | Open source | 21 Aug 2026 |
| 13 | R1 0528 DeepSeek· reasoning | — | 164K | $0.50 | Open source | 28 May 2025 |